Doors — Sliding Door Lower Roller disengagement
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Bell Model 429 helicopters must complete the required inspections and any necessary repairs or modifications within 12 months of the directive's effective date, December 15, 2025. They must follow the instructions in Bell Textron Canada Limited Alert Service Bulletin 429-15-22 Revision B or later approved revisions. Specific actions include inspecting the lower aft bracket and rail cavity, modifying roller configurations for certain serial number groups, and performing detailed roller engagement inspections with corrective actions as needed.
Summary
Canadian Airworthiness Directive CF-2025-64 addresses a safety issue affecting Bell Textron Canada Limited Model 429 helicopters, specifically serial numbers 57001 through 57447, 57449 through 57507, and 57509 through 57538. The directive focuses on preventing sliding door jamming caused by disengagement of the aft lower roller assembly from the lower rail. It mandates inspections and modifications to the sliding door lower roller assemblies to ensure safe egress in emergencies.
What changed
CF-2025-64 introduces mandatory inspections of the lower aft bracket and rail cavity for contact marks and requires repair or replacement of affected parts. It also requires modification of the roller configuration to a post-service bulletin standard for certain helicopter groups. Additionally, it establishes a detailed inspection procedure with specific conditions to identify and correct potential jamming issues.
Why it matters
This directive is critical for operators and maintenance personnel to prevent sliding door malfunctions that could impede emergency egress. Compliance ensures continued airworthiness and safety of Bell Model 429 helicopters, reducing the risk of door jamming during operation. It also provides clear guidance on inspection and modification procedures, aiding maintenance teams in meeting regulatory requirements.
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